WebApp【公共组件库】@前端(For Git Submodule)
Tevin
2020-12-01 b29ed998189c3de5e408f37d61802dfa30e4f9a8
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/**
 * CChinaArea
 * @author Tevin
 */
 
<template>
    <view class="c-china-area">
        <picker
            mode="multiSelector"
            :range="range"
            :value="current"
            range-key="label"
            @columnchange="evt=>updateColumns(evt.detail)"
            @change="evt=>handleChange(evt.detail.value)"
        >
            <view @tap="evt=>handleOpen(evt)">
                <AtInput
                    ref="input"
                    :name="itemRes.name"
                    :title="itemRes.label"
                    :required="itemRes.required"
                    :error="itemRes.error"
                    :placeholder="placeholder"
                    :value="selected"
                >
                    <AtIcon :value="loading ? 'loading':'chevron-right'" />
                </AtInput>
            </view>
        </picker>
    </view>
</template>
 
<script>
import { AtInput, AtIcon } from 'taro-ui-vue';
import ChinaLocations from './ChinaLocations';
import './cChinaArea.scss';
 
const { locationTree, getRegionNames } = ChinaLocations;
 
export default {
    name: 'CChinaArea',
    components: {
        AtInput,
        AtIcon,
    },
    props: {
        loading: {
            type: Boolean,
            default: false,
        },
        placeholder: String,
        itemRes: Object,
    },
    data() {
        return {
            range: [[], [], []],
            current: [0, 0, 0],
        };
    },
    computed: {
        selected() {
            const curVal = this.itemRes.formData[this.itemRes.name];
            if (curVal && curVal.length === 3) {
                return getRegionNames(curVal).join(' / ');
            } else {
                return '';
            }
        },
    },
    methods: {
        handleOpen(evt) {
            if (evt.target.className.indexOf('at-input__title') >= 0) {
                evt.stopPropagation();
                evt.preventDefault();
                return;
            }
            const curVal = this.itemRes.formData[this.itemRes.name];
            const range = [
                locationTree,
                locationTree[0].children,
                locationTree[0].children[0].children,
            ];
            const current = [0, 0, 0];
            // 有值
            if (curVal && curVal.length > 0) {
                // 省
                if (curVal[0]) {
                    const proviceIndex = locationTree.findIndex(
                        (provice) => provice.code === curVal[0]
                    );
                    if (proviceIndex >= 0) {
                        range[1] = locationTree[proviceIndex].children;
                        range[2] = locationTree[proviceIndex].children[0].children;
                        current[0] = proviceIndex;
                        // 市
                        if (curVal[1]) {
                            const cityIndex = range[1].findIndex((city) => city.code === curVal[1]);
                            if (cityIndex >= 0) {
                                range[2] = range[1].children[cityIndex].children;
                                current[1] = cityIndex;
                            }
                            // 区
                            if (curVal[2]) {
                                const areaIndex = range[2].findIndex(
                                    (area) => area.code === curVal[2]
                                );
                                if (areaIndex >= 0) {
                                    current[2] === areaIndex;
                                }
                            }
                        }
                    }
                }
            }
            this.range = range;
            this.current = current;
        },
        updateColumns(roll) {
            if (roll.column === 0) {
                const cities = locationTree[roll.value].children;
                this.range.splice(1, 2, cities, cities[0].children);
                this.current = [roll.value, 0, 0];
            } else if (roll.column === 1) {
                const areas = locationTree[this.current[0]].children[roll.value].children;
                this.range.splice(2, 1, areas);
                this.current = [this.current[0], roll.value, 0];
            } else if (roll.column === 3) {
                this.current.splice(2, 1, roll.value);
            }
        },
        handleChange(detail) {
            const codes = [];
            const provice = locationTree[detail[0]];
            codes[0] = provice.value;
            const city = provice.children[detail[1]];
            codes[1] = city.value;
            const area = city.children[detail[2]];
            codes[2] = area.value;
            this.itemRes.onChange(codes);
        },
    },
    mounted() {},
};
</script>